2004 audi a8l

I have a 2004 Audi A8L and my amplifier has gone bad on it...............so my CD player,AM,FM Tuner and navigation does not work.I did the optic test and found that the amp is bad.So does anyone know how to remove the AMP from the trunk.............does anyone know if there is any video's out there or any diagrams showing how to remove the amp.







Thanks

Dave